Mica-building machine.



J. R. SANBOR'N. 1 MIGA BUILDING MACHINE. APPLIOATION'TILBD AUG. 10, 1910. RENEW-ED MAY 14, 1912.

1,074,576, Patented Sept. 30, 1913.

3 SHEETS-SHEET 1.

I v I WlTNESSES: NVE TOR ATTORNEY.

J. R. SANBORN.

MIGA BUILDING MACHINE. APPLIUATIONIILED-AUG. 10, 1910. nnmw nn MAY 14, 1 912. 1,074,576..

Patented Sept. 30, 1913.

3 SHEETS-SHEET 2.

' z INZENTOR WITNESSES ATTORNEY 1 ,07 4,57 6, Patented Sept. 30, 1913.

' s SHEETS-811E311.

WITNESSES: V ZINVENTOR ATTORNEY Beit known that I, JOHN a citizen of the United States, and a resident qf yPittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvementin Mica-Buildving Machines, of which the following is JOHN R. SANBORN, or PITTSBURGH, PENNSYLVANIA, ASSIGNOR trofwns'rmenousn ELECTRIC AND MANUFACTURING COMPANY, ACORPORATION OF PENNSYLVANIA.

MICA-BUILDING MACHINE.

Specification of Letters Patent.

Patented Sept. 30,1913.

Application filed August 10, 1910, Serial No. 576,578. Renewed May 14, 1912. Serial No. 697,304.

1'0 all whom it may concern R. SANBORN,

specification.

My invention relates to the manufacture of composite insulating sheets and it has 'special reference to the manufacture of in- ;sulating sheets composed of mica flakes and a binding material or bond.

' The object of my invention is to provide 15 lation of uniform thickness and excellence,

autdmatic means for building up mica insuwith a minimum expenditure of labor and material.

{While it is a particularly tedious and expensive processcto b'uild sheet'mica insula i 'gtion'by hand, this method has been found preferable to the use of any automatic In{3.-"

chines heretofore devised, because of the i great difiiculties encountered in attempting Jflakes over a iplateor apron by any other to secure a uniform distribution of mica than manual means. Other difficulties have arisen, in attempting to handle liquid bindv ers, such as shellac, in automatic machines by reason-of the tendency for the liquid to harden and clog the outlets from which it was intended to be discharged.

' Accordingto my present invention, I

', vovercome the difficulties of. the priorart by providing a machine embodying the followmg essential features: First; a feed mocha nism for delivering a measured amount of mica flakes to the hopper of the machinez' second; a'n ejector conslsting, preferably, of a nozzle or-nozzles, a; fan, or other pneumatic means, arranged to eject the mica.

flakes from the hopper: third; redistributin'g mechanism for-disassociating the mica .ifla'kes as they are ejected from the hopper and-distributing them in the tower in which the aforesaid parts are located: fourth a device for distributing the bond in powder form. over the flakes which are deposited distributing mechanism, to fall in a perfectly disasso ciated well distributed shower upon the plate at the bottom, in an even la-yer.

On the a it is essential to provide suit-able meafis for properly distributing'the same.

Figure 1 of the accompanying drawings is a partially sectional e evatlonof a machine constructed in accordance with my 111- venti'on, and Figs. 2 and 3, are, respect ively,.a side and a sectional elevation, on a larger scale, of the top'portion of the machine shown in Fig. 1. 4

Referring to the drawings, the structure here shown comprises a tower 1, havcinga te'p member 2, which is preferably located above the floor line 3 of a balcony oriplatform and com rises a conveyer it, a receiving hopper 5, ant distributing hopper 6, an

ejector 7, acy indrical sieve or bond 'distrib-' uter 8 and suitable operating mechanism therefor. The conveyer 4 comprises a continuous belt or chain ,9 having a plurality of .pockets or buckets 1 0, .to which measured quantit-es of mica-flakes may be supplied. The arrangement of parts'is such that the contents of the pockets aresuccessively emptied into the receiving-hopper 5Q" A deflectorll is suspended from the bottom of the hopper 5 by, means of straps12, and is of substantially diamond-shape in transverse section, as shown in Fig. '2 of the drawings. The discharging;hopper '6 is directly below the outletiof the receiving hopper 5, the deflector 11 being located in itsmouthf The ejector 7 is located at the bottom of the hopper 6, the arrangement of parts being such that mica flakes fall from the hopper 5 "into the hop per 6 and are forced upwardly and outwardly there: from into the tower when'compressed' air is discharged from-the ejector 7, the deflector 11. serving to prevent the flakes fromretu intothe hopper 5.

The dry-bond distributor comprises a cylindrical. sieve which extends completely across the tower and is provided witlf-end disks l3'having annular grooves 14 .w hich rest on the side bars 16 of a frame or guide member 15. The side bars 16 are pivotally supported, at substantially their middle points, upon studs 17 and are provided with end springs 18, or other suitable means, for

limiting the degree of movement of the cylindrical sieve. I

In order to so oscillate the frame 15 to insure a proper distribution of dry bond, I provide a cam 19 and a vertical rod or bar 20 to the lower end of which the frame 15 is connected by means of a latch 21 and a pin 22, the latch and pin being normally held in engagement by means of a spring 23. If it is desired to operate the frame 15 manually, on to; prevent the continued ,oscillation thereof, the latch 21 may be withdrawn from the pin 22 by means of a handle 24 which is outside the tower and is connected to the latch by a link 2 The ejector 7 is provided'with a valve 25 which isnormally closed by a spring 26and, during the operation of the device, is intermittently opened by a means which will I site corners A dislr38, which is mounted upon the stud 39 and rigidly connected. to the gear wheel 37, is provided with projections 40 which each engage a lever 2? once in every hand thereby raises a link 28 to open .ine valve- The other side of the i r is provided with a projection 41 w ich a cam ii? to reciprocation of the 595.01 bar The cam 19 is oblong in she e and two diagtuiaily oppowhich are slightly rounded and two intermediate corners which are deeply rounded, so that the rod 26, to which the cam 19 is secured, reciprocates through two complete cycles for each revolution of the disk ZlB.

A teniplet, or receiving plate, 42 is provided, at aconvenient distance above the floor line, near the bottom of the tower, a

door43 being provided in one wall of the tower for the purposelof inserting a sheet of'paperfor "othe aterial on which the mica withdrawing the composite sheet after itis formed.

' ln order to withdraw the composite sheet without disturbing the relative position of akesar .to---be deposited and for.

the flakes, I prefer to'cmploy a truck or carrier 44, as shown in Fig. 1, having a table 4 5, the height of which may be adjusted to accommodate it to that of the templet 42.

The operation of the device is as follows:

force all the flakes out of the hopper and the deflector 11 deflects them outwardly into the upper end of the tower. The action of the air is such that the flakes are completely separated from each other and'fall in a well- "distributed shower. 'baclt and forth across the tower, as the The sieve 8 is rolled frame 15 is tilted by the cam 19, and show- ;ers the powdered bond beneath and upon the mica flake s. This process is continued until all of the pockets of the conveyer are empty,

just enough pockets being filled to make the desired number of layers) for a single insulating sheet. l

Upon the completion of the foregoing ithdrawn and is placed between two sheet iron plates which hold the parts in position on the table 45 of the truck. The process is repeated at number ofti'mes until the truclr ig; loadedv with alternate layers of sheet iron and assembled con'iposite sheets, when the whole is removed to a press having hot pressure plates and there subjected to suiiicient heat and pres-sire thoroughly a sontithe mica flakes together into. t of uniform thickness. I w rial use of my device has been r. apediently producing insulat int soeets or excellent quality and uniform thickness. v I

Structural modifications may, of course, be eliected within the spirit scope of my steps of the process, the door-43 'is opened, I 'the composite sheet is carefully to melt the dry binder and to invention, and the inventionj.-Emay be utie lized for manipulating other materials than those specifically mentioned. 1

I claim as my inventioni ,1. The combination with a tower,- of a hopper at the upper end ofthe tower for receiving flake materialan'd'an ejector for disassociating; the flakes andiforcing themf upwardly out of the hopper, lvhercby'thoj are permitted to fall to.,,the bottom of tlii tower in a uniformly distributed shower.

2. The combination witl ga' tower, and a hopper at itsuppel end, 'of a deflector in the ,mouth of the hopper and means for ejecting flake material upwardly and outwardly from the hopper into the upper end per, and means forejecting flake material layer of powdered bond among and upon said flake material.

5. The combination with a tower, a hopper, 'and means for ejecting insulating flakes from the hpyoppr into theupper end \of the tower, of means for sitting powdered insulating bond upon said flakes after they are ejected from the hopper without interrupt- 1 ingthe free downward movement thereof.

6. The combination with a tower, a hopper, and means for ejecting insulating flakes from the hopper into the upper end of the tower, of a cylindrical sieve containing powdered insulating bond and means, for. rolling the sieve back and forth across the tower, whereby alternate layers of flakes and powdered bond are deposited at the .bottom of the tower.

-'Z. The combination with a tower, a hopper, of an ejector associated with the hopper for discharging flake materialthere from into) the tower, and means fpr intermittently actuating, the ejector. J 8. The combination with a tower, a hop" per and an ejector associated with-the hopper for discharging flake material therefrom into the tower, of a cylindrical sieve containing powdered bond, a frame upon which the sieve is supported and automatic means for alternately actuating the ejector and tilting the frame, whereby alternate layers of flake material and powdered bond are depositedat the bottom of the tower.

9. The combination with a receiving hopper, and a conveyer having 'a plurality of buckets for delivering flake material to the receiving hopper, of a distributing hopper below the receiving hopper, an ejector and means forintermittently actuating the ejector -to successively discharge predetermined guant-ities of-flake material into the tower as it is received fromthe conveyer buckets.

"10. The combination with a tower having a receiving hopper at its upper end, a conveyer-having a plurality of buckets contain: ing flake material to be successively discharged intotherebeiving hopper, and a discharging hopper directly below the receiving hopper, of a deflect-or in the mouth of the discharging hopper, an ejector. associated with the discharging hopper, asieve containing powdered insulating bond, and

automatic means for alternately actuating the ejector andthe sieve-to discharge insulating bond and a predetermined quantity of flakes'as they are received from the conveyer buckets, whereby alternate layers of powdered bond and flakes are deposited at the bottom of the tower. I

11. The combination with a tower, a hopper having an upwardly directed discharge opening, of an ejector associated with the a hopper, for discharging flake material from the discharge opening of the hopperinto the top of the tower. 1

12. The combination with a tower, and means for discharging flakes into the tower, 01' means fordistributing a powdered bond over the flakes, whereby alternat lay' ers .of flakes and powdered bond are deposited at the bottom ofuthe tower.

13. The combination with a hopper located in an inclosed space, of means for forcing flake material upwardly out of'the hopper into the inclosed' space.

14. e combination with a hopper located in an inclosed space, and means for feeding flake material thereto, of means for.

ejecting said material upwardly out of the hopper into the inclosed-space.

15; The combination with ahopper 10'- cated in an inclosed space, and means for j feeding successive'charges of flake material into said hopper, of means for ejecting the successive charges of material upwardl out of the hopper to fall as showers in th inclosed space.

1G.-The combination with a hopper located in an inclosed space, andqneans for feeding successive charges of flake material into said hopper, of meansfor ejecting the material from the hopper in successive showers, and means-for discharging successive showers of powdered bond'into said in closed space.

l7. The combination with a hopperlgcated in an inclosed space, and means for supplying successive charges of flake material thereto, of means for ejectingthe successive charges of material from said hopper, and means for discharging successive showers of dry bond intg said inclosed space. I

1-8. The combination with a hopper lo cated in an inclosed space, and means for supplying successive charges of flake ma.

- terial to said hopper-{of means for ejecting the charges of material from. said hopper to form.;, successive showers in said i-nclosed space, and means for dischar ing Showers 9 commmuted dry bond; mitt? flake material. 19. The combination with a hopperlocated inan inclosEti space, meanstcr said incloie6f space in alternation with said showers rec ceied in an inclosed space, and means fol" ejecting fluke materiai upwardly out of saici ito form successive showers, of means v schnrgmg' comnunuted ciry bond into e 974mm JOHN R. SANBORN;

Witnesses:

R. J. DEARBORN,

B. HINES.

"epics of this patent. may be obtainedfor five cents each, by addi'essing the Commissioni 0! Patents,

' Washington, D. G.

1b is hereby certified that in Lettei's Patent No. 15074:,576, granted September 30, 1913, upon the applicabion of John R. Sanborn, of Pittsbui'gh, Pennsyii'ania; for an improvement in Mica- Building Machinesfien error appears in the printed specification requiring con'ection as follows: Page '3, line 80, strike out the words toiiiibf t he and that the said Letters Patent should be new}. with thie correction therein 7 that the some m y .01 1 mm to' the record of the case in the Patent ()fiice.

Signed'and seai'ed this 18th day of November, A. Y), 1913.

ceied in an inclosed space, and means fol" ejecting fluke materiai upwardly out of saici ito form successive showers, of means v schnrgmg' comnunuted ciry bond into e 974mm JOHN R. SANBORN;

Witnesses:

R. J. DEARBORN,

B. HINES.

"epics of this patent. may be obtainedfor five cents each, by addi'essing the Commissioni 0! Patents,

' Washington, D. G.

1b is hereby certified that in Lettei's Patent No. 15074:,576, granted September 30, 1913, upon the applicabion of John R. Sanborn, of Pittsbui'gh, Pennsyii'ania; for an improvement in Mica- Building Machinesfien error appears in the printed specification requiring con'ection as follows: Page '3, line 80, strike out the words toiiiibf t he and that the said Letters Patent should be new}. with thie correction therein 7 that the some m y .01 1 mm to' the record of the case in the Patent ()fiice.

Signed'and seai'ed this 18th day of November, A. Y), 1913. 

